LG LSC27931SB Service Manual

Duct door driving waveform
1. When ICE PAD is pressed in order to dispense ICE (Crushed or Cubed), Duct door motor will be energized by 1 second, in
order to open the duct door (+ 12V).
2. While ICE PAD is being pressed, voltage is not present between terminals A & B.
3. 5 seconds after release ICE PAD, duct door motor will be energized by 1 second with the inverse voltage than applied at
opening, in order to close duct door.
1.10 Duct door motor driving circuit
223
6
4
Reverse
223/100V
R61
CC26*
10
IC8
223
CON6
68,1/2W
+
M
CC24*
42
P41
8
5
IC1 MICOM
1
41
223
4.7K
/25V
9
7
BA6222
100uF
R60*
CM4
R59*
P40
Forward
4.7K
2
13
3
CE18
14
CC25*
VARIABLE TIME
DUCT DOOR
CLOSE
1 SEC5 SEC
1 SEC
0 V
-12 V
0 V
OFF
0 V
ON
OFF
+12 V
ICE DISPENSER S/W SIGNAL
(ICE PAD)
DUCT DOOR
OPEN
A
B
- 32 -

LG LSC27931SB Specifications

General

Brand	LG
Model	LSC27931SB
Category	Refrigerator
Language	English